Flu or influenza is a respiratory illness caused by a virus. It is characterized by high fever (over 101°F), extreme fatigue and body or muscle aches lasting 3 to 4 days or more. And may also give you a fever, tiredness, and general aches and pains. Flu usually starts with a dry sensation in the nose and throat.

With the sudden change of weather quite a large number of people are having some sort of flu symptoms. What is the relationship between flu and cold season? The flu loves winter or the cold season. It comes around between November and March. Study shows that many respiratory infections peak in winter, when people cluster together indoors. Also, the virus is transmitted much more efficiently in a cool environment. The virus spread much more readily at 20 percent humidity than at 80 percent.

How do we prevent this virus from hitting us? There are some preventive measures to at least lessen the impact. These are simple yet it can help us from not having to suffer from flu.

- Wash your hands. Alcohol-based hand rubs and gels are best. Ordinary soap and water will also help, and it’s not necessary to use very hot water or “antibacterial” soaps. Wash carefully after any contact with folks who have flu like symptoms.

- Keep your distance. The flu is most contagious within 3 feet of a patient.

- Wear a mask if you’re in a high-risk group and you can’t avoid getting near possible flu victims. Be sure your mask fits well. Keep it free of saliva and dry, and change it periodically.

- Protect others. Don’t go to work or school if you have the flu. Use a tissue to cover your mouth when you sneeze or cough, and dispose of it properly.

But the most effective way is to have your flu shot before the onset of the flu season. Best month is October. It will keep you safe for six months or until the end of flu season.